<?php

namespace Tests\Feature\Services\Document;

use App\Models\Document;
use App\Services\Document\DocumentCodeService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use RuntimeException;
use Tests\TestCase;

class DocumentCodeServiceTest extends TestCase
{
    use RefreshDatabase;

    protected DocumentCodeService $service;

    protected function setUp(): void
    {
        parent::setUp();

        $this->service = app(DocumentCodeService::class);
    }

    public function test_generate_returns_six_digit_zero_padded_code(): void
    {
        $this->assertMatchesRegularExpression('/^\d{6}$/', $this->service->generate());
    }

    public function test_generate_returns_code_not_used_by_existing_document(): void
    {
        Document::factory()->count(5)->create();

        $code = $this->service->generate();

        $this->assertDatabaseMissing('documents', ['code' => $code]);
    }

    public function test_generate_throws_when_no_unique_code_found_within_tries(): void
    {
        $this->expectException(RuntimeException::class);

        $this->service->generate(0);
    }

    public function test_document_observer_assigns_code_on_create(): void
    {
        $document = Document::factory()->create(['code' => null]);

        $this->assertMatchesRegularExpression('/^\d{6}$/', $document->code);
    }

    public function test_document_observer_keeps_explicit_code(): void
    {
        $document = Document::factory()->create(['code' => '123456']);

        $this->assertSame('123456', $document->code);
    }
}